Unified --Json output

[ArbaazKhan1]

addresses issue #6391

To make a universal --json flag I moved it from Fate and ServiceStatus and into ServerOpts so all commands inherit it. Added a new CommandOutputEnvelope class that will take accumulo JSON outputs and wraps them in an envelope for a unified output and a new CommandReport interface that report classes will inherit so they can produce both human-readable and computer readable lines. Started by wiring up fate --summary and service-status as the two proof-of-concept commands since both already have partial JSON support

[ArbaazKhan1]

What the Json output would look like for `accumulo inst service-status --json

{
  "command": "accumulo admin service-status",
  "version": "1.0",
  "reportTime": "2026-06-09T20:20:01Z",
  "status": "OK",
  "data": {
    "reportTime": "2026-06-09T20:20:01.889Z",
    "zkReadErrors": 0,
    "showHosts": false,
    "summaries": {
      "COMPACTOR": {
        "resourceGroups": {
          "default": 1
        },
        "serviceByGroups": {
          "default": [
            "localhost:9600"
          ]
        },
        "serviceCount": 1,
        "errorCount": 0
      },
      "GC": {
        "resourceGroups": {
          "default": 1
        },
        "serviceByGroups": {
          "default": [
            "localhost:9998"
          ]
        },
        "serviceCount": 1,
        "errorCount": 0
      },
      "MANAGER": {
        "resourceGroups": {
          "default": 1
        },
        "serviceByGroups": {
          "default": [
            "localhost:9999"
          ]
        },
        "serviceCount": 1,
        "errorCount": 0
      },
      "MONITOR": {
        "resourceGroups": {
          "default": 1
        },
        "serviceByGroups": {
          "default": [
            "localhost:9995"
          ]
        },
        "serviceCount": 1,
        "errorCount": 0
      },
      "S_SERVER": {
        "resourceGroups": {
          "default": 1
        },
        "serviceByGroups": {
          "default": [
            "localhost:9700"
          ]
        },
        "serviceCount": 1,
        "errorCount": 0
      },
      "T_SERVER": {
        "resourceGroups": {
          "default": 1
        },
        "serviceByGroups": {
          "default": [
            "localhost:9800"
          ]
        },
        "serviceCount": 1,
        "errorCount": 0
      }
    }
  }
}